使用Python成像确定罐中咖啡的高度

import cv2
import numpy as np

# 读取图像
img = cv2.imread('coffee.jpg')

# 转换为灰度图像
gray = cv2.cvtColor(img, cv2.COLOR_BGR2GRAY)

# 应用阈值化处理
ret, thresh = cv2.threshold(gray, 127, 255, cv2.THRESH_BINARY)

# 找到轮廓
contours, hierarchy = cv2.findContours(thresh, cv2.RETR_TREE, cv2.CHAIN_APPROX_SIMPLE)

# 找到最大轮廓
max_contour = max(contours, key=cv2.contourArea)

# 计算最大轮廓的矩形框
x, y, w, h = cv2.boundingRect(max_contour)

# 计算最大轮廓的高度
height = h

print("The height of the coffee in the jar is:", height)